/*
* Configure all necessary GPIO pins
*/
static void gpio_init(void)
{
/*
* Enable power on GPIO. This is not really necessary, because power
* on GPIO is enabled on SoC reset.
*/
lpc178x_periph_enable(LPC178X_SCC_PCONP_PCGPIO_MSK, 1);
/*
* Configure GPIO pins using the `ea_lpc1788_gpio[]` table
*/
lpc178x_gpio_config_table(ea_lpc1788_gpio, ARRAY_SIZE(ea_lpc1788_gpio));
#ifdef CONFIG_NR_DRAM_BANKS
/*
* Configure GPIO pins used for the External Memory Controller (EMC)
*/
struct lpc178x_gpio_dsc dsc;
/* Configure EMC data pins (DQ0..DQ31) */
dsc.port = 3;
for (dsc.pin = 0; dsc.pin <= LPC178X_EMC_DATA_PINS; dsc.pin++)
lpc178x_gpio_config(&dsc, LPC178X_GPIO_EMC_REGVAL);
/*
* Configure EMC row/column address pins (A0..A11) and
* NOR FLash address pins.
*/
dsc.port = 4;
for (dsc.pin = 0; dsc.pin <= LPC178X_EMC_ADDR_PINS; dsc.pin++)
lpc178x_gpio_config(&dsc, LPC178X_GPIO_EMC_REGVAL);
#endif
}
/*
* Configure a set of GPIO pins using the given configuration table.
* Returns 0 on success.
*/
int lpc178x_gpio_config_table(
const struct lpc178x_gpio_pin_config *table, unsigned int len)
{
unsigned int i;
int rv;
for (i = 0; i < len; i ++) {
rv = lpc178x_gpio_config(&table[i].dsc, table[i].regval);
if (rv != 0)
goto out;
}
rv = 0;
out:
return rv;
}